I'm gonna put this here, because they don't have one for tanks. And I don't really derp on dps other than the standard stuff (Elusive Jump into AOE or off the Arena, Assassinate while AOE going off, etc... It's a rite of passage, right?)

While tanking as PLD, I've been known to completely forget entire phases of fights. I don't mean, forget what to do for them. It's like I just black out, and here were are having adds spawn before divebombs, and I'm like, "wait, where'd twin go? what phase are we on?" [That could be either T5, or T13... it fits for both.]